Form for concrete work



oct. 16,1923.

E. E. HALL FQRM FOR CONCRETE woRK l919 4 Sheets-Sheet 1 APW,

Original Filed M ay .28

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E. E. HALL FORM FOR CONCRETE WORK Original Filed May 28, 1919. 4Sheets-Sheet 2 frf.

E. E. HALL FORM FOR CONCRETE WORK original Filed May 28 1919- 4sheets-smet 5 l E14 Vlllllllllll///Ay all I E. E. HALL FORM FOR CONCRETEWORK @marea a. ie, reas.

ERIC E. HALL, OF CHICAGO, ILLINOIS.

FORM FOR CONCRETE WORK.

Application tiled May 28, 1919, Serial No. 300,344; .ReneWedApi-il 2,1923.

To all whom t may concern.'

Be it known that I, ERIC E. HALL, .a vcitizen of the United States, anda resident of Chicago, in the county of Cook and State of Illinois, haveinvented certain new Aand u seiul Improvements in Forms for ConcreteWork, of which the following is a full, clear, and exact specification.

My invention is concerned with forms for making concrete floors,celllngs or arch constructions, and is designed primarily to pr0` ducesimple mold sections that can be used repeatedly without the liabilityof material damage thereto, either in use or in transportation from onejob to another, and in which the wooden faces whichcome in contact withthe concrete can be readily renewed if it should become necessary.

Second, it is further concerned with lthe production of formsor moldsections that can be quickly and easily set up when they are to be used.and which can be as quickly and easily taken down when the concrete is,

suiiciently set.

It is further concerned with the produc- Ytion'of forms or'mold sectionsthat can be readilyiadjusted to vary the width thereof so as to producea series of parallel floor girders that are spaced nearer to or furtherfrom each other. Y

It is further concerned with the production of forms of mold sectionsthat can be adjusted to vary the angle of the sides thereof to thevertical within reasonable limits.

It is further'concerned with the production of .forms or mold sectionsthat can be adjusted to make one end of one section narrower than theother end of the 4same section, as is desirable where Hoor girders areto be molded that are Wider at their ends to strengthen them at thepoint of'ther connection with the main beams or girders.

It is further concerned with the production offorms o'r mold sectionsthat can be combined and adjusted solas to form floor girders ofditi'erent lengt-hs, widths or depths.

Itis finally con-ferned with the production-of such forms or moldsections as shall he capableA of adjustment in 4any two or more, or inall of the ways incorporated in the four preceding paragraphs.

To illustrate my invention, I annex hereto four sheets-of dra/wingsiinwhich kt-ht-isarne reference characters are used todesignate E@ :twoconcrete girders that are wider at their ends to strengthen them at thepoint of their connection with the main girder;

Fig. 3 is a detail in Vsection on the line 3 -3 of Fig. 2, but on alarger scale;

Y Fig. 4 is a view similarA to Fig. 3 b-ut showingr a slightly modifiedconstruction; Y

Fig. 5 is a view of one endof a mold vsection as it would appear on theline 5-4-5 of Fig. 1it` the adjacent section tothe left were removed; f

F 6 isan end view of a mold section as seen from the 'left of Fig. 1,but on a slightly j larger scale;

Fig. 7 is a detail as seenlin section on the line -7-7 of Fig. 6. but ona larger scale;

F ig. 8 is a detail as seen in section on the line 8 8 of Fig. 5, but onaflarger scale;

Fig. k9 is a detail in section as seen on the line 9-9 of Fig. 1, but ona larger scale;

Fig. 1.0 is a detail in section as seen on the `line 10-10of Fig. 5. Y

Fig. 11 is a top plan view, on an enlarged scale of one of theextensible and adjustable struts, with one end thereof in central horizontal section;

Figs. 12 and 13 are Ydetails of the same as seen in section on the lines12'-12 and 13-13, respectively of Fig. 11;

Fig. 14 is a fragmentary view of a portion of the scai'olding with theadjacent sides of two adjacent mold sections resting thereon;

Fig. 15 is a detail in section on the 15-15 of'Fig. 14;

F ig. 16 is a view similar to the central portion of Fig. 2, but showinga modification of the construction of the tiller section; Fig. 17 is aview similar to Fig. 5,-I but illustrating a mold construction in whichthe body portion of the side and top pieces of a mold.section are formedof sheet metal instead of Wood, as illustrated in Fig. 5;

line

Fig. 18 isa view similar to the central portion of Fig.' 9,'butillustrating a modification;

Fig. 19 is a detail in section on the line 19-19 of Fig. 20,illustrating how the cen.- tral section o an end portion is held inplace before it is finally secured;

Fig. 20 is a detail in vertical section illustrating the same mechanismas is shown in Fig. 19;

Fig. 21 is a prospective view illustrating one side of an end sectionadapted for use where the side portions are to be converged, asillustrated at the ends of Fig. 2 5 and Fig. 22 is a top plan view of aportion of the end section shown in Fig. 21, but seen 0n a larger scale.

In the construction of concrete floors and ceilings, it is a commonpractice to make a. floor of a comparativelythin layer of concretereinforced at suitable intervals by parallel beams or girders formedintegrally therewith, extending downwardly therefrom and securedat theirends to the main beams or girders. As these parallel girders are ofdifferent lengths, and as they are spaced apart different distances, andare of` different widths, and depths, and are sometimes ared outwardlyat their ends, if they are to be produced by forms or' mold sectionsthat are to be used repeatedly,'it is highly desirable that these formsor mold sections shall be capable of adjustment to take care of thedifferent conditions as to dimensions yand forms that are met with, andmy invention is concerned with such a. mold section as is capable ofthese adjustments, and such as are capable of being used in combinationwith other similar mold sections, as illustrated in Fig. 2.

The general form of the intermediate mold sections between the ends, isthat of an inverted trough, and the end sections differ from theintermediate sections only in that oneend of the end 'sections aremodified with l means to close that end ofthe`trough. In

the preferred form of my invention, the mold section is made up of twosymmetrical what I may call top and side portions with a third topportion, together with mechanism for securing the three portionstogether temporarily to produce rigid trough-like forms, one of which isseen in end elevation in Fig. 5, where the left-hand sideland topportion is made up of a wooden side piece 30 and a wooden top piece 31,Vand thecooperating side is made up of symmetrical but reversed sidepieces 30a'and top pieces 31a. The wooden body portions 30 and 31 areheld together by being bolted to a pair of commonv supports 32 and 33,these supports being of the same construction, -but the support 32 issecured at one end a few inches therefrom, while the support 33 1ssecured ai the other end with the horizontal angelwoftheangle ironextending a short out of a single piecel of angle iron, whichl has aportion of the vertical web cut away, as seen at 34, so that the anglecan be bent at this point, for a reason which willbe ob- Vious. Thevvertical flange being cut away entirely to the horizontal flange leavesa weakened portion in the support at the angle so that the support maybe bent slightly at the angle as is necessary or desirable in removingthe forms, and as may be employed for varying the Iangle of the sides 30and 30 of the forms to the vertical. The boards 30 and 31 are secured tothe .supports 32 and 33 by the bolt-s and nuts 35, the bolts havingtheir heads countersunk in the face of the boards so as not to projecttherefrom. The horizontal ends of the supports 32 and 32a and 33 and 33aare adjustably connected by the bars 36, which have the air ofhorizontally elongated slots 37 an 37a therein adjacent the centerthereof, and have apertures near the ends through which are passed thebolts 38 and 38a, which bolts preferably have the squared portions 39adapted to fit in theright-angular recesses 40 formed at intervals inthe `edges of the slots 41 and 41*1 formed in the horizontal portions ofthe vertical webs of the supports 32 and 33 and 32 and 33a. The endsofthe bar 36`have the hooks 42 and 42,l formed on the ends thereof -so asto embrace the lower edges of the vertical anges of the supports 32 and33 and 32a and 33a, respectively. The adjacent ends of the horizontal.portions of the supports 32 and 33 and 32 and 33a have apertures thereinthrough which pass the bolts 43 and 43, which bolts also pass throughthe slots 37 and 37a previously mentioned, 'and by placing the bolts 38and 38a in the different recesses of the slots 41 and 41a, it ispossible to make the form of different widths so as to produce therebygirders having different distances between their centers, the notches 40preferably being half an inch between centers so that the distancesbetween the girders may be varied by inches. When the desired adjustmentis made, the bolts 38 and 38a and 43 and 43a have their nuts tightenedup and the body of the form is rigidly established except in so far asthe supports may give at the angles 34.

With the construction thus far described. there would be an open spacein the top of varying widths with different adjustments, and to closethis space, I employ a top piece 43 which is preferably composed ofalong ansa-'rae strip of sheet metal preferably slightly curvedtransversely and with a downwardly projecting, rib 44 on 'the concaveside, and

at a location corresponding to the location of the supports 32 and 33apertures are formed in the rib 44 and through these apertures 1spassedra hook or ring 45-of a link 46, which has its lower end threaded,and adapted to be swung between the arms 47 of a fork 48l projectingfrom thelower edge ot the bar l 36 in the direction away `from theco-operatkbythe lugs 49. y`When theparts are to be disassembled, a ver-yAfew turns of the wing nut willarelease it from the lugs 49jso that thelink 46'canbe swung outof engagement with the` fork 48thus -releasingthetop piece 43 .at its ends froml the side and top por- .57 are employed,and

tions. To insure the top portionbeing held down. tightly at lthe center,.Il mayV employ additional but shorter linksl similarly securedinapertures of the rib 44 and having .similarwing nuts 52 co-operatingwith the under side of a bar 53, which may be o the same generalcharacter as the bar 54. shown in Fig. 9, and like it having ends whichengage with the under sides of the boards 31 and 31a sothat byytightening up the wingv nuts 52, the central portion of the top pieces43 maybe drawn down tightly on the adjacent edgesof the boards 31 and31a. ln the use of these forms, a scadolding is formed by a series ofparallel vertical standards 55, see Figs.'14 and 15, and secured orresting on the top of these standards isa beam or bar 56. ordinarilymade of a piece of timber two inches thick and of La width correspondingto the desired width of the bottom of the girders being constructed. andthe side pieces 30 and 30a, have their lower edges 1n engagement withthe beams 56, if the girders are to bek of thel full depth for which theforms are adapted.` To support the forms, a number of crosspiecesorgirts p these may be boards of any desired width, and they are securedto the standards 55 extending horizontally 'and at right angles to thebeams 56, beneath which they are directly located when the 'girder is tobeof the full depth for which the mold is designed. 1 As a convenientmeans o` holding these girts 57 1n place l bore through the upper end ofthe standards a series ofholes 58. the alternate holes extending atright angles tol each other so as not to weaken the standards more thanis necessary, and lthrough the proper hole, l pass the horizontalthreaded portions 5 9 of the clamp 60, the vertical portion of which4engages the side of the `girt 57,as shown in Figs. 14 and 15. A wing nut61 screwed on the threaded end of the clamp serves to tem orarily securethe parts together. y.

en the girder is to be of aless depth than the full depth for which theform is adapted, the beam 56 is placed higher up betweenthe boards. 30and 30, as indicated in dotted lines in Fig. 14, and the standard 55 israised accordingly, the lowen portion of the standard being preferablyyextensible bly any suitable means. 4The clamps 60.are t 1e n placed vinlower holes .58, as-for instance in the second lower hole from thoseoccupied in the full line position ofFig. 14, and this leaves thebottoms of the forms or mold sections supported onthegirts 57 as before,Y

but with the beams 56 higher up between v,the boards 30 and 3 0a so asto make a girder y ,of less depth. e

l The boards 30 and 30a have to be secured rmlyagainst the beams 56, andfor this` purpose, l employ the extensible and adjustable `strut.62,seen :in place in Fig. 5 and illustratedin detail in Figsll, 12 and .13.a

'two sections semi-circular 'in cross-section with the radiallyprojecting flanges 69 by which the two halves are riveted together.Connected with the slot 67 by the short passages 70are the short slots71 parallel to the main slot 67, so that the pins 66 and 66a may beplaced in the main slot 67 for the purposes of preliminary extension andthen passed to the adjacent short slots 71, where ice they are caught asseen in -vFig. 11. lt will be understood that in shortening or extendingthe struts 62, the quick adjustment is made by turning the sleeve 68vsothat the pins 66 are in register with thehmain slot 67, when' thesleeves 65 and 65a`canlslide freely in the sleeve 68. After vthe quickadjustment is made, thebfinal tightening is secured by turning thesleeve 68`to bring the pins 66 and 66a in. the slots 71 and after thisis done, by turning the sleeve 68 in the opposite di- `rection, 'thesleeves 65 and -65a must necessarily turn on the threaded links 63 and63a to extendthe strut and clamp the boards 30 and 30A1 securely againstthe sides ot the.' l

beams 56. V

rlhe sections so far described are say four feet long. and where thegirders are of a length other than the exact multiplelof four feet, an'intermediate-611er of some sortis necessary between the ends, and inFigs?,v and 3, 1- have shown the snnplest form 111,'

which a board 69aL is placed over the gap in ias the top resting uponthe projecting portions of the horizontal Hanges of the supports 33 and33a, and similar boards will be placed on the sides to till the gaps,and these -use of pieces of sheet metal 70 as a substitute for theboards, and it will be obvious that a single piece of sheet metal mightbe used for the top and sides both, and the single piece or the threepieces can be secured by very small nails to the wooden pieces whichthey will overlap. In Fig. 16, l have illustrated still another form ofa ller, in which a board 71aof a narrower width than that of thecomplete form may be located as is the board 69a`in Figs. 2 and 3, andthe sides and the rest of the top may have the sheet metal filler pieces72, which will be secured to the board 7la by nails ,driven thereintothrough the apertures 73 formed in the edges of the sheet metal pieces72.

Where the end sections are not contracted at their outer ends toreinforce the ends of l the girders, as indicated in dotted lines inFig. 2, I may employ the form of an end piece illustrated in Figs. 6, 7and 9, where the side end pieces 74 and 74, symmetrical,

but reversed, have the generally rectangular shape shown, with theangular recesses 75 in the upper corner and with an inwardly projectingflange 76, best seen in Fig. 7, the inner corners of the {lange-beingcovered by the adjacent corners of that end of the top piece 43. Thesesections are held in place by the links 46, similar to the links 46, but

somewhat longer, and passed at their piv-' oted ends through apertures 77 in the short angle iron pieces 78 secured by the bolts 79 havin theirheads countersunk in the plates 74 an 74a. The threaded ends of thelinks 46a are swung into the slots V79 and 79a in the supports 32 and32, andthe wing nuts 50 are tightened up to hold the ends securely in enagement with the ends of the -boards 30 an 30a. The adjustable centerend piece 80 is similar to the top piece 43 and has the centrallylocated strengthening rib 81, which carries the previously describedshort link 51 with its' wing nut 52, passedthrough an aperture in thebar 54, which is channelshaped in its cross-section and is preferablyprovided with the recesses 82 in its edges, which recessesl are adaptedto co-operate with the inwardl projecting flanges 83 .and 83a formed tont e inner edges of the side end pieces 74 and 74a. The ends of the bar54 are turned outward, as seen in 9, so as to \engage the end pieces 74and 74a.

ln place of the specific structure ot the bar 54, shown in Fig. 9, l mayemploy the substantially equivalent form 54, shown in rampas lFig.18where the channel is open on the opposite side, and 'thereare norecesses corresponding to the recesses 82, the bar being drawn againstthe anges 83 and 83a, as before, in the plane of these danges, and itsoli'set ends drawn against the inner faces of the plates 74 and 74B.

To hold these center end plates 80 in place while the bar 54 is beingapplied, so that they can be put in place by one man, I preferablyemploy the construction shown in Figs. 19 and 20, where the upper end ofthe strengthening rib 81 is seen to have a fork 84 formed or secured onits end, the fork being provided with a pair of horizontally extendingslots 85 which are adapted to co-operate with a pin 86 passed throughthe strengthening rib 44 of the cooperating top center piece 43. Withthis construction it will be obvious that the center end piece 80 can behung in placelafter the side end pieces 74 and 74a are put in place withsu'liicient security to hold them while the operator is using both handsto secure bar 54 or 54a in place.

ln Fig. 17, 1 have shown a modification, in which the parts are just thesame as in Fig.v 5, except that the outer covering of the side and toppieces is constructed of sheet metal, producing symmetrical,- butreversed, side and top pieces 301 and 301, these pieces having an angleso that a single piece of sheet metal takes the place of two boards 30andv 31. These pieces of sheet metal are bolted to the supports 32 and33 and 32a and 33, as before.

Where the end sections have their outer ends narrowed as compared to theinnerends, as shown in full lines in Fig. 2,- to strengthen the ends ofthe girdlers, l preferably employ the form of side end piece' 87, shownin-Figs. 21 and 22, and this substantially vertical wall of the pieces301 and 301a have inwardly projecting ilanges 88 thereon, and the sideend piece 87 has the Ahorizontal flange 89 at its upper end, whichilange is adapted to extend underneath the horizontal portion ot theside and top pieces 3 01 and 30P. The side end piece is provided on itsinner edge with the flange 83, as before. As this end piece mustaccommodate itself to the slight swinging movement of the sides 'of thebody sections about the angle formed where the vertical web of thesupports 32 and 33 are cut away, this end piece is secured at its upperend to the lange 88 by a bolt 90 having its head countersunk in theplate 87 and extending through an 'aperture in the Harige 88 and securedby a nut screwed on the inside. At the lower end of the plate 87 is abolt 91 having its head countersunk in the plate 87 and passed throughan aperture in said plate and through the slightly elongated aperture92- in the flange 88 which aperture is curved lll() screwed von theinner end ofr thebolt 91.' -'ll`o accommodate the necessary swingingoutward of the side of the plate 87 having the flange 83 to make `theend as a whole stand atright anglesto the axis of the form, the side endpiece 87 is secured tothe hori- 4 zontal portion of the part` 3,01 byajbolt 93 havingits headcountersunk inthe plate 301 and extendingthrough an aperture'thereinl and through an aperture 94 in the llange'89and a nut is screwed on the end of the bolt to secure the partstogether. Another bolt 95 has its head countersunk in the top. of: thepartBvOliand extendsl through the slightlyv elongated slot 96 formedinthe flange 89 and curvedl about the aperture 94 as a center.. Withthis, construction, the angle. of

the side end piece 87 can be adjustedsoas to make it stand at rightanglesto the axis of the form, and when thus adjusted a nut Screwed onthe end of the bolt 95 will sve. cure the side end piece rigidly inplace, after which the center end piece 8() is secured in the customarymanner.

While I have shown and described my invention as embodied in the formwhich l at present consider best adapted to carry out its purposes, itwill be understood that vit is capable of modifications and that l donot desire to be limited in the interpretation of the following claimsexcept as may be necessitated by the state of the prior art. What llclaim as new, and desire to secure by Letters Patent of the UnitedStates iS:

1. A horizontally extending Jform for concrete work comprising-aplurality of members each consisting of a plurality of one piece anglebars extending across the member 'on the inside thereof with thevertical webs of the bars projecting inwardlyand cut away at the anglesof the members, and a plurality `ol" boards having their faces securedto the outside of the bars and extend-v ing lengthwise and transverselyof the 'bars to form the mold surfaces, and means to secure the membersinto a rigid form, said means being located entirely within the forms soas to leave no projections outside to which the concrete might adhere.

' 2. horizontally extending form for con,- c'rete workvv comprising avplurality of memf bers 'eachconsisting of av plurality of onepiece'angle bars extending across the member onV the inside thereof withthe vertical webs of -the bars projecting'inwardly and cut away at the-anglesor"` the members, and a plurality of boards having their facessecured'to the outside of the'bars and extend-l ing lengthwise andtransverselyof the. bars to'f'orin 'thejmold'surfacea the boards at oneend .terminating in the middle of the horizontal webs to form asupport'for the adjacent end of a cooperating form.

3. A form for concrete work consisting of" a plurality of anglebarsextending acrossy the form on the inside thereof with the verticalwebs 'of the bars projecting inwardly and cut away Aat the angles oftheforms', a`

pluralityof 'boards havingv their facessecured to the outside of thebars ,and extend'- ing lengthwise and transversely of thel bars tov formythe mold surfaces, and extensible struts connecting the ends of theangle bars for, ho-lding said en ds spaced firmly apart.

4. .A form for concrete work consisting ofl al plurality of angle'barsextending across the form` on the Linside thereovfwithy the KYverticalwebs ,of the bars projecting inwardly and cut away at the angles ofthejforms, a plurality ofl boards having their faces securedfto theoutsiderof. the bars and extend-l ing lengthwise and transversely ofl`the bars to form the mold surfaces, the boards at one end terminating inthe middle lof the horizontal webs to `form a support for theadjacentend of a cooperating form, a form for concrete work consistingofa plurality of angle bars extending across the formon the inside thereofwith the vertical webs lof the bars projecting inwardly and cut away atthe angles of the forms, a plurality of boards having their facessecured to the outside of the bars and extending lengthwise andtransversely'ofthe bars to form the mold surfaces, and extensible strutsconnecting the ends of the angle bars` vfor holding said ends spacedirmly apart.

5. lln a transversely adjustable form for concrete work, the combinationwithan Overlapping sheet metal central top portion, of a pair ofassociated side and top portions, angular in cross-section, the bodiesof-wh-ich are formed of wood, and mechanism for rigidlyl securing"` said-three portions together temporarily at `suitable intervals to formrigid trough-like forms of diilerent widths in dierent adjustments. l

ln a transversely adjustable form for concrete work, the combinationwith a central top portion, of a'pair of associated side and topportions angular in cross-section.

and mechanism for rigidly securing said `forms, said mechanismconsisting of links suspended from the center of the top portion, crossbars having their ends extending beneath the tops of'said side portionsand having apertures in their central portion through which the linkspass, and nuts threaded on the bottoms of the links -and engaging theunderside of the bars.

f depending from the projecting flange and adapted to be secured to thetransverse bars, and means for holding the Abottom edges of the side andtop portions spaced apart in any position of adjustment.

9. In a transversely adjustable form for concrete work, the combinationwith an overlapping metallic lcentral top portion having a central,downwardly projecting Harige, of a pair of associated side and topportions havlng inwardly projecting transverse ribs near their ends,transverse bars adapted to be connected to the adjacent ribs, linksdepending from the projecting flange and adapted to be secured to thetransverse bars, and means for holding the bottom edges o the side andtop portions spaced apart in any position of adjustment, the connectionsbetween the ribs and the transverse bars consisting of slots and boltsextending therethrough, some of the slots having spaced angular recessesto cooperate with squared sections of the bolts passing therethrough.

1G. In a form for concrete work, the combination with sides and topportions. havino' s means for varyin the effective width oft e 'orm, ofextensi le struts connecting the sides, said struts being provided withmeans for catching them quickly at suitable spaced distances, and withscrew mechanism for intermediate adjustments.

11. In a :form for concrete work, the combination with sides and topportions having means for varying the effective width 'of the form, ofextensible struts kconnecting the sides, each of said struts consistingof a pair of-threaded members connected to the sides and projectinginwardly toward each other, and a second pair of members screwed ontothe first, a single member between said second pair, and connectionsbetween said' second pair and said single member, whereby the latter canbe quickly connected or disconnected to the second pair in any one ofvarious spaced positions, and then rotated to turn the second pair ofthe first for final adjustment.

I,12. ln a form for concrete work, the combination with sides and topportions having means for varyin the effective width ofA the form, ofextensi le struts connecting the sides, each of-said strutsconsisting'of a pair of threaded members connected to the sides i andprojecting inwardly toward each other, of a second pair of membersscrewed onto 'the lirst, a single tubular member between said secondpalr having centrally elongated slots with reverses at the sides thereofat spaced intervals, and a pin carried by each of said second pair andentering its respective elongated slot.

13. In a form for concrete work, the comtogether to form a rigidstructure, of an end portion, and mechanism for temporarily securing theend portion to one end of the rigid structure.

15. In a form for concrete work, the combination with top and sideportions, and

mechanism for securing them temporarily l together to form a rigidstructure, of an end portion consisting of an overlapping center pieceand two side pieces, and mechanism for temporarily securing the endportion of one end of the rigid structure, said last mentioned mechanismconsisting of means to secure the center piece to the side pieces, andthe side pieces to the side portions of the body of the form.

16. In a form for concrete work, the combination with top and sideportions, and mechanism for securing them temporarily together to formarigid structure, of an end portion consisting of an overlapping centerpiece and two side pieces, and mechanism for temporarily securing theend portion to one end 'of the rigid structure, said side ieces havinglinks pivoted thereon with t eir other ends threaded, and side portionsfor rigid forks thereonthrough which the ends of the links ass, and nutson the ends of the links, and) means forsecuring the center end piece tothe side end pieces.

17. In false work for concrete construction, the combination with aseries of forms having their adjacent sides spaced apart to formgirdersbetween them, of a series of standards extending'between theseries of forms, a series of horizontal beams forming the bottoms of thegirders supported on the tops of the standards, and series of supportsextending transversely of the beams for the lower edges of the formscarried by the standards, and means for securing the supports atdifferent distances-from the tops of the standard to vary the depth ofthe girder constructed. n

18. In false worlrorconcrete construction, the combination with a-seriesof forms having their adjacent sides spaced apart to form girdersbetween them,- of a series of standards extending between the series offorms, a series of horizontal beams kforming the bottoms of the girderssupported on the tops of the standards, and series of supports extendintransversely of the beams for the lower e es of the forms carried vbythe standards, said standards having a series of apertures therein atdifferent distances from the top of the standard, and clamping means tosecure the supports to the standards at one of the apertures to vary thedepth of y the girder constructed.

19. In false work for concrete construction, the combination with aseries of forms having their adjacent sides spaced apart to form girdersbetween them, of a series of standards extending between the series offorms, a series of horizontal beams forming the bottoms of the girderssupported on the tops of the standards, and series of supports extendingtransversely of the beams for the lower edges of the forms carried bythe standards, said standards having a series of apertures therein atdifferent distances from the top of the standard, the adjacent aperturesextending at right angles to each l other, and clamping means to securethe supports to the standards at one of the apertures to vary the` depthof the girder constructed. 20. In a form for concrete work, thecombination with top and side portions, and mechanism for securing themtemporarily together to form a rigid construction, of an end portion,means for supporting the end portion in approximately its innerposition, and mechanism for securing said end portion temporarily invsaid final position.

21. In a form for concrete work, the combination with top and sideportions, and

mechanism for securing them temporarily together to form a rigidconstruction, of an end portion,A a horizontally slotted fork carried bythe end portion, a pin carried b v the top portion adapted to enter theslots in the Jfork to support the end portion in approximately its finalposition, and mecha nism for securing said end portion temporarily insaid final position.

22. In a yform for concrete work, the combination with a side and topportion capable ozt having the angle of the side to the top varied, ofan end portion attached thereto by a pivotal connection at the top ofsaid end portion and a slot and pin conneet-ion at the bottom thereof,and means for securing the pinv in different positions in the slot.

28. In a form for concrete work, the comabination with a side and topportion capable of having the an leof the side to the longi' tudinalaxis of t e form varied,'of an end portion attached thereto by a pivotalconnection at the outer end of the top of said end portion and a slotand pin connection at the inner end of the top of said end portion, andmeans for securing-the pin in different positions in the slot.

24. In a form for concrete work, the combination with a side and topportion capable connections at the bottom and at the inner edge of thetop, and means for securing the two pins in different positions in thetwo slots.

ERIC E. HALL. [LL 5.] Witness:

JOHN HOWARD MoELRoY.

